Fuse for electric circuits



No. 748,639. PATENTED JAN. 5, 1904.

T. NAGEL.

FUSE FOR ELECTRIC CIRCUITS.

APPLICATION FILED APR. 24. 1903.

N0 MODEL.

fig 3% w I {pitta/216 57.

UNITED STATES Patented January 5, 1904;.

PATENT OFFICE.

THEODORE NAGEL, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO LATHROP I-I. COLLINS, OF CHICAGO, ILLINOIS.

FUSE FOR ELECTRIC CIRCUITS.

SPECIFICATION forming part of Letters Patent No. 748,639, dated January 5, 190 1.

Application filed April 2d, 1903. Serial No. 154,069. (No model.)

To all whom it may concern.-

Be it known that I, THEODORE NAGEL, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Fuses for Electric Circuits, of which the following is a full, clear, and exact description.

The object of my invention is to provide a simple, economically-constructed, and eifective fuse for electric circuits which is particularly adapted for use in telephone-circuits and is so constructed that in addition to possessing a rigid structure it enables the ends of the fuse to be soldered to the contacts from the exterior, and thereby permit such connection to be made in a much more effective manner and with a great saving of solder. This I accomplish by the means hereinafter fully described and as particularly pointed out in the claims.

In the drawings, Figure l is a side View of my invention. Fig. 2 is a longitudinal central section therethrough, taken on dotted line 2 2, Fig. 1, looking in the direction of the arrows. Fig. 3 is a transverse section taken on dotted line 3 3, Fig. 1, looking in the direction indicated by the arrows. Fig. 4 is a view similar to Fig. 3, but taken on dotted line 1i 4, Fig. 1, and looking in the direction indicated by the arrows. Fig. 5 is a detail view looking at the end of one of the end caps or thirnbles of the fuse.

Referring to the accompanying drawings, A represents a wooden body of suitable length which has a longitudinal central opening or bore a, therethrongh, the diameter of which is preferably about the same throughout its length. This body A is preferably cylindrical and has its ends inclosed in caps or thimbles B B, which are secured thereon by the transverse pins 19 b or in any other suitable manner. These pins strike through the body'in a plane to one side of the center of the bore thereof, so as not to interfere with the passage of the fuse-wire therethrough.

The head of the caps B B are each provided with a diametrical slot C, extending, preferably, from side to side thereof, and these slots are each provided at about their centers of length with alateral recess offset 0. The binding-plate D at one end of the fuse and the binding-plate E atthe other end each consists of a flat piece of metal having tangs d and e, respectively, extending therefrom in the same plane, which are of a width and thickness corresponding substantially to the dimen sions of the slots C in the heads of the caps B, through which they are inserted into a suitable longitudinal slit g in the ends of the body A of the fuse inclosed within said caps. The lengths of the tangs d and e and the slits g are such that they are hidden from sight by the caps, and when the tangs have been inserted in said slits, so that the shoulders in the edges of the binding-plates resulting from the formation of the narrower tangs will bear against the ends of slots C, said plates are permanently secured in position against the possibility of lost motion by the passage of pins 5 I) through said tangs.

The outer end of the binding-plate D is preferably round,anditistapped transversely by a screw F, which has a Washer h thereon between its head and plate D and a nut G on its screw-threaded end extending through said plate. The opposite binding-plate E is of a rectangular shape, and its outer end edge is in a transaxial plane at right angles to said plate and is provided with a lateral flange 76, substantiallyasshown. Arectangularclamping-plate K is secured to the side of plate E, from which the flange 7t projects, by mean of a transverse screw I, extending through it and tapped through plate E, and a nut on said screw on the opposite side of plate E.

In constructing my invention a fuse-wire J is inserted longitudinally through the bore of the body A, and its ends are extended alongside of and past the tangs through and beyond the offset 0 a short distance and then are bentiaterally and anchored and connected to the plate by solder M. When the solder M is applied, the ends of the wire J melt and become homogeneous therewith, and thus avoids the possibility of an imperfect connection, which has heretofore been one of the great obstacles necessary to contend with Where such connection had to be made at points inside the body A of fuses of this character.

What I claim as new is- 1. An electric fuse comprising a fibrous body, having a bore of uniform diameter extending throughout its length; suitable caps secured over the ends thereof; binding-plates secured to the ends of said body; and continuous fuse-Wire extending through said bore and soldered to and joining said bindingplates and caps.

2. An electric fuse comprising a fibrous body, having a bore of uniform diameter extending throughout its length; suit-able caps secured overtheendsthereof; binding-plates secured to the ends of said body; and continuous fuse-wire extending through said bore and connected to and joining said binding-plates and caps at points beyond the ends of said body.

3. An electric fuse comprising a fibrous body, having a bore of uniform diameter extending throughout its length; suitable caps securedovertheendsthereof; binding-plates secured to the ends of said body; and continuous fuse-wire extending through said bore and soldered to and joining said bindingplates and caps at points beyond the ends of said body.

4. An electric fuse comprising a fibrous body; binding-plates having smooth tangs extending longitudinally into the ends of said body; and fuse-wire extending through said body and past said tangs and soldered to said binding-plates.

5. An electric fuse comprising a fibrous body; caps secured over the ends of the same having a fuse-Wire opening therein; bindingplates secured to the ends of said body; and fuse-wire extending through said body and out of said openings in said caps and soldered to said binding-plates.

6. An electric fuse comprising a fibrous body; caps fitted over the ends of the same, each having a transverse slot in the head thereof, and an offset opening mediate the ends of said slot; binding-plates having a flat tang inserted through said slots longitudinally into the ends of said body; and a fusewire extending through said body, past said tangs, and out of said ofiset openings and soldered to said binding-plates.

7. An electric fuse comprising a fibrous body having a bore extending longitudinally therethrough and having diametrical longitudinal slits inits ends; caps fitted over the ends of the same each having a diametrical slot in the head thereof which is provided with a lateral ofiset at its center of length; flat binding-plates having alining flat tangs which are inserted longitudinally through the slots in the heads of said caps into the slits in the ends of The body; transverse pins striking through said caps, body and tangs in a plane to one side of the center of the body; and a fuse-Wire extending through the bore of said body, past the tangs and out through said offsets and has its ends soldered to said binding-plates.

8. An electric fuse comprising a fibrous body having a bore extending longitudinally therethrough and having diametrical longitudinal slits in its ends; caps fitted over the ends of the same each having a diametrical slot in the head thereof which is provided with a lateral offset at its center of length; flat binding-plates of greater wid th than the length of said slots having narrower alining flat tangs which are inserted longitudinally through the slots in the heads of said caps into the slits in the ends of the body; transverse pins striking through said caps, body and tangs in a plane to one side of the center of the body; and a fuse-Wire extending through the bore of said body, past the tangs and out through said ofisets and has its ends soldered to said binding-plates.

9. An electric fuse comprising a fibrous body; caps secured over the ends of the same having a fuse-wire opening therein; bindingplates secured to the ends of said body; and fuse-Wire extending through said body and out of said openings in said caps and soldered to said binding-plates and said caps.

10. An electric fuse comprising a fibrous body; caps fitted over the ends of the same, each having a transverse slot in the head thereof; binding-plates having a flat tang inserted through said slots longitudinally into the ends of said body; and fuse-Wire extending through said body, past said tangs, and soldered to said binding-plates and said caps.

In testimony whereof I have hereunto set my hand this 20th day of April, 1903.

THEODORE NAGEL.

Witnesses:

S. H. COLLINS, E. K. LUNDY. 

